GMBUS_RATE_50KHZ   36 drivers/gpu/drm/gma500/psb_intel_reg.h #define   GMBUS_RATE_50KHZ	(1<<8)
GMBUS_RATE_50KHZ 3212 drivers/gpu/drm/i915/i915_reg.h #define   GMBUS_RATE_50KHZ	(1 << 8)